JPH01155174A - Refrigerating showcase for ice-cream - Google Patents

Abstract

PURPOSE: To set the temperature of ice cream to a temperature so that the ice cream can be sold easily for display by setting a lower room in a refrigerator being divided into upper and lower rooms to the stocking part of goods and the heating part of a container being stocked and providing a control circuit for starting and ending a heating operation independently of a cooling operation. CONSTITUTION: The inside of a showcase is divided into upper and lower shelves by a division plate 10 where an expandable heat-insulating material is filled between aluminum plates, and the upper and lower shelves are used as a display sale part and a second cooling room 12 of a stock part, respectively. A heating pipe 20 for allowing a hot gas refrigerant to flow is provided as a heating means on one wall inner surface of the second cooling room 12, and the inside of the second cooling room 12 is heated by controlling a hot gas that flows to the heating pipe 20. A container 13A that moves to a first cooling room 11 out of the container of the second cooling room 12 is provided at a wall surface side where the heating pipe 20 is provided for staging heating. At this time, both cooling rooms 11 and 12 are being cooled, thus mainly heating the surface of ice cream from the upper portion of a container, gathering cold air at a lower portion, and suppressing the temperature increase of the ice cream.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] Industrial Field of Use The present invention relates to a frozen showcase for ice cream in which the temperature of ice cream to be displayed and sold can be adjusted to a temperature that makes it easy to sell.

Conventional technology There are frozen showcases for freezing and displaying containers filled with ice cream, especially dipping showcases that store dog-shaped ice cream containers such as 5P and 10J2 and scoop out appropriate amounts for sale. Usually, the freezer compartment is divided into at least two upper and lower compartments. A transparent section with a transparent door that can be opened and closed is formed above the freezer compartment. In addition, the upper room is used as a container display and sales department, and the lower room is used as a container stocking area, but the upper room is usually several degrees warmer than the lower room due to heat loss such as intrusion heat that enters from the transparent part and radiant heat. For example, the upper chamber is maintained at a temperature of about 10°C to -14°C, and the lower chamber is maintained at a temperature of about 5°C to -20°C. An example of this is Japanese Utility Model Publication No. 18120/1983.

On the other hand, Japanese Utility Model Application Publication No. 10276/1983 discloses a refrigerator showcase that divides the freezer compartment into at least two upper and lower compartments, and in which electric heaters are disposed at appropriate locations.

Problems to be Solved by the Invention In the former of the publications listed in the prior art, the upper chamber is lower than the lower chamber due to cooling losses such as intrusion heat and radiant heat (this is called cooling load). The cooling device controls its operation so that the temperature in the upper chamber is at a temperature that makes it easy to scoop out the ice cream (essentially, ice cream, including sherbet) in the container. has been done.

Therefore, if you want to transfer the containers stocked in the lower room to the upper room and sell them immediately, the temperature is lower than the temperature at which it is easy to scoop, so the amount that can be scooped at a time is small and you will have to scoop it many times. Otherwise, there are problems such as not being able to carry out a single sale, taking a long time to remove, and making it unsuitable for immediate sales.Furthermore, the work of scooping out dust can cause sales personnel to suffer from key sheath inflammation. ), and it was difficult to say that the sales work was necessarily good.

On the other hand, in the latter publication, an electric heater is disposed at a suitable location within the refrigerator to raise the temperature of the chamber in which the heater is disposed, and thus the temperature of the ice cream in the container, thereby making it easier to scoop out the ice cream. However, in this embodiment, an electric heater is disposed in the lower part of the upper chamber (specifically, chamber A) so as to surround the container, and is energized during the thermocycle when the operation of the refrigeration cycle is temporarily stopped. The energization control is performed so that the refrigeration cycle is de-energized when the operation is restarted. For this reason, while the ice cream in the container is heated mainly at the bottom, heat is also transferred to the top of the container through natural convection or forced convection, raising the air temperature at the top, causing the surface of the ice cream to absorb warm air. The hardness (approximately -10°C to -13°C) is suitable for scooping ice cream with a pusher when it comes into contact with the ice cream.
Since heating occurs only when the refrigeration cycle is stopped, the temperature control status of room A varies depending on the location of the temperature detection means that controls the operation and stoppage of the refrigeration cycle.
It is not always possible to maintain the temperature between 0° C. and −13° C., and there may be cases where the temperature is too high or not high enough, which may cause problems in terms of the quality of the ice cream.

Therefore, the present invention provides a freezer in which the lower chamber of the freezer compartment, which is divided into upper and lower parts, can be used both as a stock section and as a heating chamber.

[Structure of the invention]

Means for Solving the Problems The present invention comprises an outer box, an inner box made of metal with an opening at the top and a cooling pipe provided on the outer surface, and a heat insulating material filled between the two boxes. A refrigerator for ice cream, whose upper part is made up of a transparent part with a transparent window and a transparent door that can be opened and closed, and whose interior is divided into an upper chamber for product display and a lower chamber for product storage by partition plates. It provides a showcase,
Furthermore, it includes a heating means disposed in the lower chamber to heat the lower chamber, and a control circuit for controlling the operation of the heating means, and the control circuit starts and ends heating independently of the cooling operation. .

The heating operation of the lower chamber (-second cooling chamber) (12) in which the operational heating means is arranged is controlled independently of the cooling operation, so
By performing a heating operation while cooling, warm air is collected in the upper part of the lower chamber, the surface of the ice cream is intensively heated from above the container in the lower chamber (12), and cold air is collected in the lower part and the ice cream is heated. We are trying to suppress the increase in quality as much as possible.

EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1 to 5.

(1) has five sides closed at the bottom except for the top, an outer box (2) formed into a box shape, a foam insulation material (3) interposed inside the outer box (2), and further inside. An inner box (4) made of a metal with excellent water resistance and thermal conductivity, such as stainless steel, is arranged, and a transparent part (4) equipped with a transparent window (5) and a transparent door (6) that can be opened and closed at the top of the inner box (4) is provided. 7). Cooling pipes (8) are tightly installed on the outer surface of the inner box, and the refrigerant is circulated in the cooling pipes to circulate inside the freezer compartment (9).
) to cool down. In addition, the inside of the refrigerator (9) is divided into upper and lower sections by partition plates (10) having insulation properties filled with foam insulation material between opposing aluminum plates, and the upper section is divided into a first cooling room ( 11), and the lower stage is a second cooling chamber (12) serving as a stock section. In addition, in the second cooling room (12), there is a lower door (12) for putting in and taking out containers (13) filled with ice cream.
4). Furthermore, there is a machine room (1
5), and mechanical parts such as a compressor (16), a condenser (17), and a condenser blower (18) that constitute the refrigeration cycle are installed in this machine room (15).

A heating pipe (20) through which a hot gas refrigerant flows as a heating means is arranged on the inner wall of the second cooling chamber (12), and the hot gas flowing through this heating pipe (20) is controlled. By doing so, the inside of the second cooling chamber (12) can be heated. A refrigerant circuit including this heating tube (20) is shown in FIG. 3, and a condenser (1
7) and the inlet side of the solenoid valve (21) are connected, and the condenser (
The outlet side of 17) is connected to the inlet side of the cooling pipe (8) via a capillary tube (22) as a pressure reducer,
The outlet side of the cooling pipe (8) is connected to the inlet side of the compressor (16). On the other hand, the output side of the solenoid valve (21) is connected to the check valve (23) via the heating tube (20), and the check valve (23) is connected to the inlet side of the capillary tube (22). has been done. In addition, the dashed-dotted line shown in the figure is the insulation material (3)
It represents the part buried inside.

The control circuit for controlling the opening and closing operations of the solenoid valve (21) is shown in FIG. In this figure, (25)
(26) is a heating start switch that instructs the start of heating; (26) is a heating end device such as a timer or temperature detector that instructs the end of heating (in this example, a timer is used for convenience of explanation)
, (27) are directly involved in opening and closing the electromagnetic valve (21), and the excitation coil (28) is a power source, which is in an open state when energized and in a closed state when not energized.

To explain the heating operation with this configuration, the second cooling chamber (
12) among the containers stocked in the first cooling chamber (
11) The container (13A) to be moved to the heating tube (
20) on the wall side where the heating start switch (
25> is turned on. This will cause the timer (26
) and the excitation coil (27) are energized, the solenoid valve (21) is opened, and the hot gas exiting the compressor <16> is diverted to the heating pipe (20>), and the second cooling chamber is (1
2) heating is started. At this time, both the cooling chambers (11) and (12) are cooled by the cooling pipe (8) through which the low temperature liquid refrigerant flows through the condenser (17) and the capillary tube (22). Then, when the time set by the timer (26) (for example, 3 to 5 minutes) has elapsed, the excitation coil (27) is de-energized, the solenoid valve (21) closes, and the heating tube (20) is turned off. The hot gas flow stops and heating ends. In addition, since the inside of the refrigerator (9) is divided into the first and second cooling chambers (11) and (12) by the partition plate (10) having heat insulation properties, the air heated by the heating pipe (20) In this case, the air temperature in the first cooling chamber (11) does not rise.

On the other hand, an electric heater (30) may be employed as the heating means. However, in this case, if the location of the electric heater (30) is selected on the bottom surface of the partition plate (10), the container (13
), it is suitable for heating the surface of ice cream. Note that the excitation coil (27) in the previously presented control circuit may be replaced with the electric heater (30) as a circuit for controlling the power supply to this heater. In addition, this electric heater (30) is connected to the partition plate (10).
By placing it on the entire bottom surface of the container and dividing it into an appropriate number so that the energizing points can be selected and switched as appropriate, heating can be performed for each division, making it possible to arbitrarily select the container to be heated. This also has the advantage of being able to perform heating without moving the container, allowing for more efficient use.

Hereinafter, the heating tube (20) and the electric heater (30) will be collectively referred to as heating means.

By configuring as described above, not only can the second cooling chamber 12) be used as a stock section for containers filled with ice cream, but also it is possible to form an area that is heated while cooling. It becomes possible to place the container to be moved to the first cooling chamber (11) in the area (- division) and heat it, and to immediately sell the ice cream in the container to be moved. It works effectively. In addition, since the second cooling chamber (12) can be heated while being cooled, the effects of heating on other customer appliances that are not intended for sale (deterioration of quality due to melting, deterioration of refrigeration condition, and increase in room temperature) sudden rise, etc.)
can be made smaller. Furthermore, the air heated by the heating means collects in the upper part of the second cooling chamber (12), and the air cooled by the cooling pipe (8) collects in the lower part. It is possible to intensively heat the surface of the ice cream.

〔Effect of the invention〕

As described in detail above, according to the present invention, the upper chamber of the warehouse divided into upper and lower chambers is used as a product display section, and the lower chamber is not only used as a product stock section, but also serves as a storage container for stocked products. It can be used as a heating section. Also,
Since the heating operation by the heating means is started and ended independently of the cooling operation by the control circuit, it is particularly effective when moving containers from the lower chamber to the upper chamber for sale. To make ice cream immediately available for sale, to smoothly fill a display section with products, and to achieve good continuous sales of ice cream.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention, and FIG. 1 is a sectional view taken along the line A-A in FIG. 2 with the transparent part omitted, FIG. 1 is a refrigerant circuit diagram corresponding to FIG. 1, FIG. 4 is a schematic circuit diagram of a solenoid valve control circuit, and FIG. 5 is a sectional view taken along line A-A showing another embodiment. (1)... (for ice cream) frozen showcase,
(2)...Outer box, (3)...Insulation material, (4)・
...Inner box, (7>...Transparent part, (8)...Cooling pipe, (10)...Dividing plate, (11)...First cooling chamber, (12)... Second cooling chamber, (13)...container, (20)...heating tube, (21)...

Claims (1)

[Claims] 1. The lower part consists of an outer box, a metal inner box with a top opening with cooling pipes on the outside, and a heat insulating material filled between both boxes, with a transparent window and a transparent door that can be opened and closed. In the ice cream freezer showcase, the upper part of which is constituted by a transparent part, and the inside of the freezer is divided by a partition plate into an upper chamber for product display and a lower chamber for product storage; For ice cream, comprising a heating means for heating a lower chamber and a control circuit for controlling the operation of the heating means, the control circuit starting and ending heating independently of the cooling operation. Frozen showcase.